Submission #1041349

#	Time	Username	Problem	Language	Result	Execution time	Memory
1041349		MarwenElarbi	Permutation (APIO22_perm)	C++17	91.33 / 100	1 ms	440 KiB

perm

#include <bits/stdc++.h>
#include "perm.h"
using namespace std;
#define pb push_back
std::vector<int> construct_permutation(long long k)
{
	k--;
	vector<int> tab;
	int cnt=0;
	int mx=0;
	for (int i = 62; i > 0; --i)
	{
			while(mx==0&&k>=(1LL<<i)-1){
				mx=i;
				k-=(1LL<<i)-1;
				tab.pb(i);
			}	
		  while(mx>0&&k>=(1LL<<(i-1))){
				k-=(1LL<<(i-1));
				tab.pb(i);
			}	
	}
	sort(tab.rbegin(),tab.rend());
	vector<int> ans;
	int j=1;
	for (int i = 0; i < mx;++i)
	{
		ans.pb(tab.size()+i-1);
		while(j<tab.size()&&mx-i==tab[j]){
			ans.pb(tab.size()-j-1);
			j++;
		}
	}
	return ans;
}

Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:29:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |   while(j<tab.size()&&mx-i==tab[j]){
      |         ~^~~~~~~~~~~
perm.cpp:9:6: warning: unused variable 'cnt' [-Wunused-variable]
    9 |  int cnt=0;
      |      ^~~

• Subtask 1: 10 / 10
• Subtask 2: 81.333333333 / 90